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Measurement and Payment <br /> Payment for removal and placement of the topsoil stockpile will be on a per yard basis, at the unit price <br /> bid in item 5 of the Bid Schedule. The per yard cost established in item 5 of the Bid Schedule will cover <br /> all costs for excavation, transportation and placement of the topsoil material. Payment shall be as this <br /> task is completed and approved by the PROJECT MANAGER. <br /> Task 6 Contour Furrow Construction <br /> The goal of this task is to create contour furrows at various locations throughout the Project Area for the <br /> purpose of slowing surface water runoff and to encourage sheet flow of runoff as it flows through the <br /> furrows. This is useful in order to minimize sediment transport from the project area until vegetation <br /> becomes established. The furrows will be constructed after backfilling, grading and ripping operations <br /> described in Task 4, Earth Work, are completed. The locations of the furrows will be staked in the field <br /> by the PROJECT MANAGER prior to construction. <br /> The furrows will be constructed to the following specifications, unless otherwise directed by the <br /> PROJECT MANAGER: <br /> The furrows will be triangular in shape. Each furrow will be a minimum of eighteen inches (18") deep as <br /> measured from the base of the furrow to its crest. Side slopes will be no steeper than 2H:1V. See Figure <br /> 4, Generalized Cross Section of Contour Furrows. Contour furrows must be constructed on contour so <br /> that the base of the furrow has a slope of 0%. CONTRACTOR shall ensure that the slope requirement is <br /> met during construction of each furrow. <br /> It is anticipated that furrows will be constructed above and on the floor remnant of Stockpile B, on the <br /> floor remnant of Stockpile M, and at the western margin of the Warehouse Vicinity. <br /> The estimated number of furrows and the estimated aggregate length of the furrows by location are <br /> tabulated below. Note that the actual length and number of contour furrows constructed may vary from <br /> this estimate. <br /> LOCATION NO. OF FURROWS TOTAL LENGTH (FT.) <br /> Stockpile B 3 450 <br /> Stockpile M 4 400 <br /> Warehouse Area 3 450 <br /> 13 <br />